#include <ctype.h>
#include "../ourhdr.h"

int main(void)
{
    int c;
    while ((c=getchar())!= EOF )
    {
        if(isupper(c))
        {
            c = tolower(c);
        }
        if(putchar(c) == EOF) 
        {
            err_sys("output error");
        }
        if(c == '\n')
        {
            fflush(stdout);
        }
    }
    exit(0);
}